simplify plot_test

Author: alexcjohnson

test/jasmine/tests/plots_test.js

@@ -414,30 +414,19 @@ describe('Test Plots', function() {
                 '_hmpixcount', '_hmlumcount', '_mouseDownTime', '_legendMouseDownTime',
             ];
 
+            var expectedUndefined = [
+                'data', 'layout', '_fullData', '_fullLayout', 'calcdata', 'framework',
+                'empty', 'fid', 'undoqueue', 'undonum', 'autoplay', 'changed',
+                '_promises', '_redrawTimer', 'firstscatter', 'hmlumcount', 'hmpixcount',
+                'numboxes', '_hoverTimer', '_lastHoverTime', '_transitionData',
+                '_transitioning'
+            ];
+
             Plots.purge(gd);
             expect(Object.keys(gd).sort()).toEqual(expectedKeys.sort());
-            expect(gd.data).toBeUndefined();
-            expect(gd.layout).toBeUndefined();
-            expect(gd._fullData).toBeUndefined();
-            expect(gd._fullLayout).toBeUndefined();
-            expect(gd.calcdata).toBeUndefined();
-            expect(gd.framework).toBeUndefined();
-            expect(gd.empty).toBeUndefined();
-            expect(gd.fid).toBeUndefined();
-            expect(gd.undoqueue).toBeUndefined();
-            expect(gd.undonum).toBeUndefined();
-            expect(gd.autoplay).toBeUndefined();
-            expect(gd.changed).toBeUndefined();
-            expect(gd._promises).toBeUndefined();
-            expect(gd._redrawTimer).toBeUndefined();
-            expect(gd.firstscatter).toBeUndefined();
-            expect(gd.hmlumcount).toBeUndefined();
-            expect(gd.hmpixcount).toBeUndefined();
-            expect(gd.numboxes).toBeUndefined();
-            expect(gd._hoverTimer).toBeUndefined();
-            expect(gd._lastHoverTime).toBeUndefined();
-            expect(gd._transitionData).toBeUndefined();
-            expect(gd._transitioning).toBeUndefined();
+            expectedUndefined.forEach(function(key) {
+                expect(gd[key]).toBeUndefined(key);
+            });
         });
     });